build(deps): bump spring from 4.2.0 to 4.2.1 (#1050)

Author: dependabot[bot]

Gemfile.lock

@@ -470,7 +470,7 @@ GEM
       json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.2)
-    spring (4.2.0)
+    spring (4.2.1)
     spring-watcher-listen (2.1.0)
       listen (>= 2.7, < 4.0)
       spring (>= 4)